Rhea-AI Sentiment reads the wording of the document, how positive or negative its language is on a 1 to 5 scale. The balance of points shown with the takes weighs what the document actually discloses, so the two can disagree, for example when a trial that missed its main goal is described in upbeat language.
Cabaletta Bio, Inc. (CABA) is the issuer in an amended ownership report by T. Rowe Price Investment Management, Inc., which reported beneficial ownership of 28,138,417 common shares, or 13.1% of the class. It reported sole voting power over 28,048,173 shares and sole dispositive power over 28,138,417, with no shared power in either category. T. Rowe Price Small-Cap Value Fund was separately identified as holding 15,367,961 shares, or 7.1%; T. Rowe Price Investment Management expressly denied being the beneficial owner.
Key Figures
Beneficial ownership reported:28,138,417 sharesPercent of class reported:13.1%Sole voting power:28,048,173 shares+3 more
6 metrics
Beneficial ownership reported28,138,417 sharesT. Rowe Price Investment Management, Inc.
Percent of class reported13.1%T. Rowe Price Investment Management, Inc.
Sole voting power28,048,173 sharesT. Rowe Price Investment Management, Inc.
Sole dispositive power28,138,417 sharesT. Rowe Price Investment Management, Inc.
Fund interest15,367,961 sharesT. Rowe Price Small-Cap Value Fund
Fund interest as percent of class7.1%T. Rowe Price Small-Cap Value Fund
Key Terms
beneficial ownership, Sole Voting Power, Sole Dispositive Power, investment adviser
4 terms
beneficial ownershipregulatory
"Amount beneficially owned: 28138417"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Sole Voting Powerregulatory
"Sole Voting Power 28,048,173.00"
Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.
Sole Dispositive Powerregulatory
"Sole Dispositive Power 28,138,417.00"
Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.
investment adviserregulatory
"is the investment adviser"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What is T. Rowe Price Investment Management's reported CABA stake?
T. Rowe Price Investment Management reported beneficial ownership of 28,138,417 CABA common shares, or 13.1% of the class. It reported sole voting power over 28,048,173 shares and sole dispositive power over 28,138,417, and expressly denied being the beneficial owner.
Who receives dividends and sale proceeds on CABA shares managed by T. Rowe Price?
T. Rowe Price does not serve as custodian; the client or the client's custodian or trustee bank has the right to receive dividends and sale proceeds. The ultimate power to direct receipt is vested in the individual and institutional clients it advises.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 6)
CABALETTA BIO INC
(Name of Issuer)
COMMON STOCK
(Title of Class of Securities)
12674W109
(CUSIP Number)
10/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
12674W109
1
Names of Reporting Persons
T. Rowe Price Investment Management, Inc.
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
MARYLAND
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
28,048,173.00
6
Shared Voting Power
0.00
7
Sole Dispositive Power
28,138,417.00
8
Shared Dispositive Power
0.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
28,138,417.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
13.1 %
12
Type of Reporting Person (See Instructions)
IA
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
CABALETTA BIO INC
(b)
Address of issuer's principal executive offices:
2929 ARCH STREET, SUITE 600, PHILADELPHIA, PA, 19104
Item 2.
(a)
Name of person filing:
T. Rowe Price Investment Management, Inc.
(b)
Address or principal business office or, if none, residence:
1307 Point Street, Baltimore, MD 21231
(c)
Citizenship:
Maryland
(d)
Title of class of securities:
COMMON STOCK
(e)
CUSIP No.:
12674W109
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
28138417
(b)
Percent of class:
13.1 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
28048173
(ii) Shared power to vote or to direct the vote:
0
(iii) Sole power to dispose or to direct the disposition of:
28138417
(iv) Shared power to dispose or to direct the disposition of:
0
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required.
Ownership of More than Five Percent on Behalf of Another Person (1) Price Investment Management does not serve as custodian of the assets of any of its clients; accordingly, in each instance only the client or the client's custodian or trustee bank has the right to receive dividends paid with respect to, and proceeds from the sale of, such securities. The ultimate power to direct the receipt of dividends paid with respect to, and the proceeds from the sale of, such securities, is vested in the individual and institutional clients which Price Investment Management serves as investment adviser. Any and all discretionary authority which has been delegated to Price Investment Management may be revoked in whole or in part at any time. Except as may be indicated if this is a joint filing with one of the registered investment companies sponsored by Price Investment Management which it also serves as investment adviser ("T. Rowe Price Funds"), not more than 5% of the class of such securities is owned by any one client subject to the investment advice of Price Investment Management. (2) [T. ROWE PRICE SMALL-CAP VALUE FUND ]: T. ROWE PRICE SMALL-CAP VALUE FUND, of which T. Rowe Price Investment Management, Inc. is the investment adviser, holds the securities reported herein in their investment portfolio managed by T. Rowe Price Investment Management, Inc. and such funds have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities that they hold. T. ROWE PRICE SMALL-CAP VALUE FUND has an interest in 15,367,961 of the class reported herein representing 7.1% of the class.
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. T. Rowe Price Investment Management, Inc. hereby declares and affirms that the filing of Schedule 13G shall not be construed as an admission that Price Investment Management is the beneficial owner of the securities referred to, which beneficial ownership is expressly denied.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
